fix: execute pre- and post-bench scripts for non-perf walltime runner #619

Job	Run time
plan	23s
build-local-artifacts (aarch64-unknown-linux-musl)	2m 12s
build-local-artifacts (x86_64-unknown-linux-musl)	1m 24s
build-global-artifacts	20s
host	0s
announce	0s
custom-bump-action	0s
	4m 19s

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